100% Biogas for Urban Transport

Linköping is a city located in the middle of an agricultural district on the east coast of Sweden, with 140,000 inhabitants. Because of its location, the prerequisites for building biogas plants are therefore apparent. The manure from cattle and pigs in the area could be codigested with abattoir waste and organic waste from other food industries in the area. In the early 1990s, the city of Linköping was in the process of converting the bus fl eet to use alternative fuel in order to reduce the local pollution from diesel buses. The most interesting alternative was to shift to natural gas. However, the decision to expand the natural gas grid from the south and up to the central parts of Sweden was delayed. The City of Linköping, therefore, decided to use locally-produced biogas as fuel for the urban bus fleet.